﻿using System;
using System.Text;
using System.Runtime.InteropServices;
using System.IO;
using System.Collections.Specialized;


public class IniFiles
{
    public string FileName; //INI文件名
    //声明读写INI文件的API函数
    [DllImport("kernel32")]
    private static extern bool WritePrivateProfileString(string section, string key, string val, string filePath);
    [DllImport("kernel32")]
    private static extern int GetPrivateProfileString(string section, string key, string def, byte[] retVal, int size, string filePath);
    //类的构造函数，传递INI文件名
    public IniFiles(string AFileName)
    {
        // 判断文件是否存在
        FileInfo fileInfo = new FileInfo(AFileName);
        //Todo:搞清枚举的用法
        if ((!fileInfo.Exists))
        { //|| (FileAttributes.Directory in fileInfo.Attributes))
            //文件不存在，建立文件
            System.IO.StreamWriter sw = new System.IO.StreamWriter(AFileName, false, System.Text.Encoding.Default);
            try
            {
                sw.Write("SouFun配置文件");
                sw.Close();
            }

            catch
            {
                throw (new ApplicationException("Ini文件不存在"));
            }
        }
        //必须是完全路径，不能是相对路径
        FileName = fileInfo.FullName;
    }
    //写INI文件
    public void WriteString(string Section, string Ident, string Value)
    {
        if (!WritePrivateProfileString(Section, Ident, Value, FileName))
        {

            throw (new ApplicationException("写Ini文件出错"));
        }
    }
    //读取INI文件指定
    public string ReadString(string Section, string Ident, string Default)
    {
        Byte[] Buffer = new Byte[65535];
        int bufLen = GetPrivateProfileString(Section, Ident, Default, Buffer, Buffer.GetUpperBound(0), FileName);
        //必须设定0（系统默认的代码页）的编码方式，否则无法支持中文
        string s = Encoding.GetEncoding(0).GetString(Buffer);
        s = s.Substring(0, bufLen);
        return s.Trim();
    }

    //读整数
    public int ReadInteger(string Section, string Ident, int Default)
    {
        string intStr = ReadString(Section, Ident, Convert.ToString(Default));
        try
        {
            return Convert.ToInt32(intStr);

        }
        catch (Exception ex)
        {

            return Default;
        }
    }

    //写整数
    public void WriteInteger(string Section, string Ident, int Value)
    {
        WriteString(Section, Ident, Value.ToString());
    }

    //读布尔
    public bool ReadBool(string Section, string Ident, bool Default)
    {
        try
        {
            return Convert.ToBoolean(ReadString(Section, Ident, Convert.ToString(Default)));
        }
        catch (Exception ex)
        {

            return Default;
        }
    }

    //写Bool
    public void WriteBool(string Section, string Ident, bool Value)
    {
        WriteString(Section, Ident, Convert.ToString(Value));
    }

    //从Ini文件中，将指定的Section名称中的所有Ident添加到列表中
    public void ReadSection(string Section, StringCollection Idents)
    {
        Byte[] Buffer = new Byte[16384];
        //Idents.Clear();

        int bufLen = GetPrivateProfileString(Section, null, null, Buffer, Buffer.GetUpperBound(0),
         FileName);
        //对Section进行解析
        GetStringsFromBuffer(Buffer, bufLen, Idents);
    }

    private void GetStringsFromBuffer(Byte[] Buffer, int bufLen, StringCollection Strings)
    {
        Strings.Clear();
        if (bufLen != 0)
        {
            int start = 0;
            for (int i = 0; i < bufLen; i++)
            {
                if ((Buffer[i] == 0) && ((i - start) > 0))
                {
                    String s = Encoding.GetEncoding(0).GetString(Buffer, start, i - start);
                    Strings.Add(s);
                    start = i + 1;
                }
            }
        }
    }
    //从Ini文件中，读取所有的Sections的名称
    public void ReadSections(StringCollection SectionList)
    {
        //Note:必须得用Bytes来实现，StringBuilder只能取到第一个Section
        byte[] Buffer = new byte[65535];
        int bufLen = 0;
        bufLen = GetPrivateProfileString(null, null, null, Buffer,
         Buffer.GetUpperBound(0), FileName);
        GetStringsFromBuffer(Buffer, bufLen, SectionList);
    }
    //读取指定的Section的所有Value到列表中
    public void ReadSectionValues(string Section, NameValueCollection Values)
    {
        StringCollection KeyList = new StringCollection();
        ReadSection(Section, KeyList);
        Values.Clear();
        foreach (string key in KeyList)
        {
            Values.Add(key, ReadString(Section, key, ""));

        }
    }
    /**/
    ////读取指定的Section的所有Value到列表中，
    //public void ReadSectionValues(string Section, NameValueCollection Values,char splitString)
    //{　 string sectionValue;
    //　　string[] sectionValueSplit;
    //　　StringCollection KeyList = new StringCollection();
    //　　ReadSection(Section, KeyList);
    //　　Values.Clear();
    //　　foreach (string key in KeyList)
    //　　{
    //　　　　sectionValue=ReadString(Section, key, "");
    //　　　　sectionValueSplit=sectionValue.Split(splitString);
    //　　　　Values.Add(key, sectionValueSplit[0].ToString(),sectionValueSplit[1].ToString());

    //　　}
    //}
    //清除某个Section
    public void EraseSection(string Section)
    {
        //
        if (!WritePrivateProfileString(Section, null, null, FileName))
        {

            throw (new ApplicationException("无法清除Ini文件中的Section"));
        }
    }
    //删除某个Section下的键
    public void DeleteKey(string Section, string Ident)
    {
        WritePrivateProfileString(Section, Ident, null, FileName);
    }
    //Note:对于Win9X，来说需要实现UpdateFile方法将缓冲中的数据写入文件
    //在Win NT, 2000和XP上，都是直接写文件，没有缓冲，所以，无须实现UpdateFile
    //执行完对Ini文件的修改之后，应该调用本方法更新缓冲区。
    public void UpdateFile()
    {
        WritePrivateProfileString(null, null, null, FileName);
    }

    //检查某个Section下的某个键值是否存在
    public bool ValueExists(string Section, string Ident)
    {
        //
        StringCollection Idents = new StringCollection();
        ReadSection(Section, Idents);
        return Idents.IndexOf(Ident) > -1;
    }

    //确保资源的释放
    ~IniFiles()
    {
        UpdateFile();
    }
}

